Rectifier: 5U4 Comments: Fender switched back to the blackface era cosmetics some time in 1980.The Vibrolux, a vacuum tube-based electric guitar amplifier by Fender, is a highly sought-after vintage guitar amplifier.The amp was primarily manufactured between the late 1950s and the 1970s.It will not cut through the mix as easily as the stingin tone of the Deluxe Reverb.In general we don’t recommend the mods on this page that increase the power and clean headroom unless you are playing your amp at gigs on medium/large stages and you need more sparkling clean notes or funky rythm chords to cut through.